bug#35624: log-view-diff regression

[Eli Zaretskii]

> From: Juri Linkov <juri@linkov.net>
> Date: Wed, 08 May 2019 00:56:29 +0300
> 
> bug#28466 caused a regression in 26.0.50.  Maybe it's too late to fix it
> in the release branch, so the patch below is for master.

If you want me to consider installing a change in emacs-26, please
show a reproducible recipe, because I don't think I understand the
situation where the problematic behavior happens.

Thanks.